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Non-Renormalization Properties of the Chern-Simons Action Coupled to Matter

Alberto Blasi, Nicola Maggiore, Silvio P. Sorella

hep-tharXiv:hep-th/9204045

Abstract

We analyze an abelian gauge model in 3 dimensions which includes massless scalar matter fields. By controlling the trace anomalies with a local dilatation Ward identity, we show that, in perturbation theory and within the BPHZL scheme, the Chern-Simons term has no radiative corrections. This implies, in particular, the vanishing of the corresponding β function in the renormalization group equation.

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